The only way to see it clearly is from the air, where the buried ditches betray themselves as cropmarks, subtle differences in the colour and height of growing plants that reveal the outline of structures long since vanished from the surface. Two concentric fosses, or ditches, describe a circle roughly twenty-five metres across, and what appears to be an entrance gap opens through the outer fosse on the eastern side.

Aerial photography taken in July 1989 as part of the Cork Archaeological Survey Aerial Programme captured the site in enough detail to identify not only the double-ditched enclosure but also a small rectangular annexe attached to its southeastern side. A linear cropmark extends eastward from this annexe and then turns northward, suggesting the remnant of a field boundary associated with whatever settlement or activity once occupied the site. A further complication lies in the outer fosse itself, which appears to be overlain by a separate enclosure, indicating that the ground here was used, altered, and reused over time, with one phase of activity cutting across or obscuring an earlier one. This kind of layering is common in Irish archaeology, where the same patch of land attracted repeated occupation across centuries, sometimes millennia.

The site is invisible to anyone walking the fields today. Its existence is known almost entirely because of what dry summers do to crops growing over buried features, thinning them above compacted soil and making them thrive above the moisture-retaining fill of old ditches. Without that photograph taken on a July morning more than three decades ago, the double enclosure at Wallstown would likely remain entirely unknown.